Sewing-machine



(No Model.) 2 Sheets-Sheet 1.

. O. E. TIBBLES.

SEWING MACHINE.

No. 328,534. Patented Oct. 20, 1885.

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(No Model.) 2 Sheets-sheet 2.

C. E. TIBBLES.

SEWING MACHINE.

N0. 328,534. Patented 0013. 20, 1885.

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UNITED STATES PATENT OFFICE.

CHARLES E. TIBBLES, OF BURLINGTON, IOWA, ASSIGNOR, BY MESNE AS-SIGNMENTS, TO THE TIBBLES MANUFACTURING COMPANY, OF CHICAGO,

ILLINOIS.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 328,534, dated October20,1885.

Application filed August 31, 1883. Serial No. 105,255.

To all whom it may concern:

Be it known that I, CHARLES E. TIBBLEs, of Burlington, Des Moinescounty, State of Iowa, have invented a new and ImprovedShuttle-Lever-Operating Mechanism for Sewing-Machines; and I herebydeclare the following to be a full, clear, and exact description of thesame, reference being had to the ac companying drawings, making part ofthis specification, in which Figure 1 is a bottom plan view of myimproved shuttlelever operating mechanism. Fig. 2 is a cross-sectionthrough the wrist-pin. Figs. 3 and 4 are details.

My invention relates to mechanisms for operating sewing-machineshuttle-levers; and it consists of certain combinations of devices anddetails of construction, as will hereinafter be fully described, andspecifically pointed out in the claim.

In order that those skilled in the art may make and use my invention, Iwill proceed to describe the manner in which I have carried it out.

The general character of the operating mechanism for the shuttlelever isthe same as shown in Letters Patent N 0. 274,057, but improved so thatthe independent gibs have no lateral movement on the crank-wrist.

In the said drawings, M M are two ways or rails on the lower surface ofthe bed-plate, in which slide the ends of two downwardly-projectingarms, 1" r, secured together near their upper and lower ends by screwsin a manner hereinafter set out, and having their exterior faces concavein cross-section.

Fitting around a portion of the circumference of the wrist of the crankare two independent gibs, t t, having their backs convex,

0 to fit into and slide or reciprocate in the concave faces of arms 1"r.

The crank-wrist may have collars (not (No model.)

shown) at each end, against which the ends of the gibs t t bear. Oneofthe arms, 4, adjacent to the end of the shuttle-lever, is connected toit by means of a pitman, N, which is pivoted to the shuttlelever at a.

In order to take up the lost motion induced by the wear on the gibs t tand arms, r r, I connect the arms 1" r at their tops and hottoms byscrews in the following manner: One arm, 4, has cut in its upper andlower edges a slot or recess, 6, of a width to snugly fit the diameterof the body of the screw, and the other arm, 1", is bored and threadedat the top and bottom at points corresponding with recesses 6. Thescrews 7 7 are provided with rigid collars d d near their heads, thedistance between the heads and collars being equal to the thickness ofarm'r, so that the body of the screw between the head and collar can bepassed into slots or recesses 6 6, the collar resting against the innerside of arm 0* and the head against the outer surface. The tapped endsof the screws enter the screw-holes in arm 7" and are secured by nutsand jam-nuts, the screws drawing the arms 1" r together until theysnugly draw the gibs against the crankwrist.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, 1s-

The shuttle-lever D and pitman N, in combination with the independentarms 1" r, secured together, substantially as described, guides on whichsaid arms slide, the independent gibs t t, and the crank-wrist E, allconstructed, arranged, and operated substantially as described.

CHARLES E. TI BBLES.

Witnesses:

R. K. EVANS, N. D. ADAMS,

